How to identify high speed rear in TT
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Topic author - Posts: 147
- Joined: Tue Mar 12, 2019 8:43 pm
- First Name: Alex
- Last Name: Dragone
- * REQUIRED* Type and Year of Model Ts owned: 1910 Roadster, 1911 Torpedo, 1915 Touring, 1926 Roadster
- Location: Orange, CT
How to identify high speed rear in TT
I just acquired a 26 TT truck and it has a ruckstell and Rocky Mountain brakes. I have been told that some of these TTs came with a 5:1 gear ratio rear axle. How can I identify if this truck has it? Do I have to disassemble the rear? The previous owner was said to have driven it at 35 mph or more. Any help would be appreciated. Thanks
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- Posts: 1690
- Joined: Sun Jan 06, 2019 12:23 pm
- First Name: Jeff
- Last Name: Humble
- * REQUIRED* Type and Year of Model Ts owned: 1926 Canadian built coupe, 1924 TT C-cab, survivor 1924 roadster
- Location: Charlevoix, Mi
- MTFCA Number: 28034
- Board Member Since: 2006
Re: How to identify high speed rear in TT
Jack up one wheel, crank the engine over by hand and count the revolutions of the engine and the wheel.
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- Posts: 490
- Joined: Sun Jan 06, 2019 11:14 am
- First Name: Henry
- Last Name: Petrino
- * REQUIRED* Type and Year of Model Ts owned: 1918 TT
- Location: Modesto, CA
Re: How to identify high speed rear in TT
If memory serves I think if you jack up one wheel, turn the crank and count the engine revolutions it takes for one wheel revolution you need to divide by 2. 5 engine revolutions should get 2 wheel revolutions meaning it has 5:1 gears. If it takes a little over 7 engine revolutions to get 2 wheel revolutions' then it's a low speed set.
At lest that's how I remember it. If I'm wrong, somebody please correct me.
At lest that's how I remember it. If I'm wrong, somebody please correct me.